Valve.



A. JACKSON & F. G. DRESCHER.

VALVE.

APPLIOATION FILED AUG. 24, 1914.

Patented Feb. 2, 1915.

WIT ESSES NVENTORS.

A TTORNE YS.

1'HE NDRRIS PETERS co.4 PHOTO-LITHD.. WASHINGTON. D. C.

.ANDREW JACKSON AND FRANK C. DRESC-IER, OF CHICAGO, ILLINOIS.

"VALVE,

Luanne.

Specification of Letters Patent.

Patented Feb. 2, 1915.

Application iled August 24, 1914. Serial No. 858,341.

To olli/17mm it may concern Be it known that we, ANDREW JACKSON and FRANK C. Danser-1ER, citizens of the United States, residing at Chicago, in the county of Cook and State of lllinois, have invented certain new and useful improvements in `Valves, of which the following is a specification.

rThis invention relates to valves for controlling the escape ot air from steam radiators and its object is to provide a simple and etlicient valve which eiectually prevents the escape of water to the outside thereof.

A further object ot' the invention is to provide a heat controlled means which,pre vents the escape of steam from the radiator.

A further object of the invention is to provide a means whereby water which has filled the valve from the flooding ot' the radiator may be quickly drained therefrom when water in the radiator reeedes t0 the boiler.

TVith these objects in view, reference is had to the accompanying drawing, in which- Figure 1 is an elevation of the Valve; Fig. 2 is a central vertical section thereof, and Fig. 3 is a horizontal section thereof taken on line lf-f-of Fig. 2.

Referring more particularly to the drawing, 5 denotes a float chamber which is screwed or otherwise connected at the bottom to an inlet nipple G, which latter. in turn, is connected to the radiator (not shown) by means of a tubular connection 7. The nipple is cylindrical in form and its walls are corrugated vertically as shown at 8. lVithin the nipple is seated a cylindrical member 9 which is made of hard rubber or similar substance which expands to a required extent when in contact with steam and is not subject to corrosion from watel1 or steam. Said member 9 has a vertical central bore 10 and a smaller horizontal bore 11 in the side facing the inlet connection 7. In the latter, and positioned centrally thereof, is a narrow7 tube 12, whose outer end extends slightly beyond the outer end of the connection 7 and whose inner end is snugly held in the bore 11 and communicates with the Vertical bore 10 of the member 9.

In the chamber 5 is mounted a hollow metal float 13 which normally seats on the member 9, thus forming a closure for the upper end of the bore 10. The sides of the float are Hunted, as shown at 14, to allow more space for air or steam in the float chamber 5. The latter is slightly reduced in width above the float, as shown at 15, and terminates in a short neck 16. rllhe neck is internally threaded to receive a plug 1T, which has a central bore 18 tapering to an outlet aperture 19 at the outer end of' the plug. The top of the float 13 is conical and has an upwardly projecting needle valve Q0. which enters the bore 18 of' the plug 17 and is adapted to control the outlet aperture 19.

The bottom of' the nipple (5 is flat and has a circular groove Q1 in its inner face. said groove also having a straight intermediate portion 29. lccated on a diametrical line.

lin operation, steam entering the radiator first crowds the air out through the valve. Hence, the passage of the air through the valve will not be obstructed. as the air will enter the nipple 6, rise about the float 13 and escape through outlet aperture 19. As soon as steam begins to enter the valve, however, it will act upon the member 9 coming into Contact with more of its exterior surface by way of the internal grooves formed by the corrugaticns 8 of the nipple walls; the steam will also enter the bore 10 by way of the tube 12 and bcttcm grooves Q1 and 22. rlhus, with a large portion of its surface exposed to the steam. the member 9 will eXnand from the heat and will lift the float 13 sufficiently to enable the needle valve 20 to close the outlet aperture 19. This will stop further outflow of steam. lf the radiator becomes flooded at any time and water collects in the fioat chamber the float 13 will rise and close the valve Q0. thereby preventing water frcm flowing out through the outlet aperture 19 into the room. iVhen the water recedes from the radiator to the boiler. water in the valve should also recede; bnt, as the float 13. of its buoyancy. keeps the valve Q0 closed. no air enters through aperture 19 to relieve the vacuum formed by the falling of the water in the float chamber 5. However. air from the radiator will enter the nipple through the connection 7 while the bore 10 and tube 12 still contain water, and rise in the chamber 5. The chamber 5 will now become filled with air. the water falling and iiowing .into the radiator through tube 12. A. small amount of' water will necessarily remain in the ninple. but a fresh supply of steam will quickly boil it out.

We claim:

1. An air vent valve for radiators comprising a ioat chamber having an inlet, and an outlet provided with an escape port, the bottom of the float chamber having intercommunicating grooves,ahollow expansible member mounted on the grooved bottom of the chamber, the grooves establishing communication between the interior of the eX- pansible member and the float chamber, a float subject to the influence of said member, and a valve carried by the float, said valve controlling the aforesaid escape port.

'2. An air vent valve for radiators comprising a float chamber having an inlet, and an outlet provided with an escape port, an expansible member located on the bottom of the chamber, said member having a central longitudinal aperture, and a lateral branch aperture leading therefrom, a conduit extending from the inlet and passing through the lateral aperture and opening into the longitudinal aperture, a float subject to the influence of the expansible member, and a valve carried by the float, said valve controlling the aforesaid escape port.

3. An air vent for radiators comprising a float chamber having an inlet, and an outlet provided with an escape port, the bottom of the oat chamber having intercommunicating grooves, a hollow expansible member mounted on the grooved bottom of the chamber, the grooves establishing communication between the interior of the eX- pansible member and the oat chamber, a conduit extending from the inlet and passing' through the expansible member to the interior thereof, a ioat subject to the influence of the expansible member, and a valve carried by the float, 'said valve -controlling the aforesaid escape port.

In testimony whereof We affix our sig natures in presence of two Witnesses.

ANDREW JACKSON. FRANK C. DRESCHER. Witnesses:

S. J. LEHRER, H. Gr. BATCHELOR.

Ccpes of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

